◪ 1.All the steel pipes used are hot-pressed seamless steel pipes. All the main materials are Q235 steel, in line with GB700-88
◪2.The pipe-to-pipe connection and pipe-to-connector connection use a butt weld or full-period fillet weld.
◪ 3.All butt welds must be cut-through welds. These welds are not specified and the weld grade is Grade 3.
◪ 4.Where the weld is not a fillet weld, the weld foot is not less than 4mm. All exposed mouths have sealing plates.
◪ 5.Bolts are galvanized common large hex head bolts, in line with GB5780-86; nuts in line with GB41-86.
◪ 6.The membrane fabric is made of PVC membrane material with PVDF coating on the surface.
◪ 7.The wire rope material conforms to the universal wire rope standard "GB/T8918-196" and its surface is galvanized.
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